sunnen



Original Filed April 24, 1929 2 Sheets-Sheet 1 fill!!! H. rlllfffllllllfldullllll l Alldllllllfl i;

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JOJAFH SUNA/E/V.

4 r TOE'NE Y.

March 14, 1933 .1. SUNNE'N HONING DEVICE FOR CYLINDERS mama Mar- 14,1933

- JOSEPH spam, or xmxwoon, mssouar HON'ING DEVICE FOR CYLINDERS Original Io. 1,848,871, dated February 28, 1982, Serial l fo. 867,748,'flled April 24, 1888.

reissue flled- July 15, 1988. Serial 170. 628,775.

' This invention relates to new'and useful improvements in honing or lapping devices carrier in which are mounted longitudinally disposed cylinder engaging elements.

latter are adjustable radially relative to the axis of rotation in order to compensate for wear and to take care of varioussized cylindrical chambers in which the device oper'ates.

As disclosed in the aforesaid application,

certain of said cylinder engaging elements are of, non-abraslvematerial and are Sllltably arranged with" respect tothe abrasive elements forthe purpose of steadying the device durin operation and revent chattering, thereby insuring uni ormv and efficient operation of the device. Originally, these non-abrasive. elements have been made ments were not entirely satisfactory as the hardness of the wood varied so that said non-abrasive elements would not wear evenly in some instances. Then again, the wood elements did not always have the proper amount of braking action or drag to steady the device and eliminate completely I thepregnated with rubber whichproduces the' necessary steadying effect on the device and 'provide: a non-abrasive cylinder /'engaging element having a certain degree-of resiliency The of hardwood but it was found in actual practice that in some cases the wood elebeen experimented with but it was found prevents chattering, and which atthe same tar-red to, I discloseka honing Application for so as to maintain at all times an eflicient operating contact between said elements and y the cylindrical chamber in which the device operates and which will not become glazed in service but will preserve at all times the prqper frictional contact with the cylinder wa V Another object of the invention is to provide non-abrasive cylinder engaging elements or guides adapted to fit snugly in the cylinder and at thersame time becapable of yielding to pressure imposed in operation between the guide and cylinder wall. On account of the resiliency of the non-abrasive guide elements the amount of yield is variable, depending upon the pressure exerted against the guides. 1

Add'tional objects of the invention are to provide non-abrasive elements ofstrips of rubber and fabric which possess the neces-. sary resiliency and wear resisting qualities desirable in the operation of devicesof the class described. 7 1

With these and other objects in view, my invention consists in certain novel features of construction and 'arrangeinent'of parts,

hereinafter-more fully described and claimed, and :illustrated in the accompanying drawm s, in which: a

'on line 4- 4 of Figure 3.

Figure 5 is ahbnzontal cross section taken on line 55 of Figure 3.

tail viewof one of the mounts and showing one of the nonsabrasiveicylinder engaging elements disposed therein.

abrasive element yieldingly mounted therein.

Figure 8 is a horizontal cross section through the same.

In' my copending application above re Figure 6 is an enlarged perspective de-- Figure 7 is a vertical section through one ofthe channel members and showing a'non-' or lapping deigure 1 is a side elevational view of my 8 engines, pumps, and the like, but more perticularly, of automobile and airplane en-' gines. The device is so constructed that it vice designed especially for honing or lapping, the cylinders of internal combustion can be readily attached to and operated bv an electric hand drill (not shown) which allows easy -,manipulation of the device and does not require special machining or a great deal of handling of the cylinder blocks; bus the engine block can be operated upon with out the removal thereof from the chassis.

Referring by numerals to the accompany-- ing drawings, 10 indicates a carrier: having mounted at one of its ends a ring 11 which is pivotally connected thereto by screws 12;

This ring is pivotally supported at points disposed at right angles to screws 12 by screws 13, which are carriedby depending spaced ends 15 of abifu'rcated member 16. The opposite or upper end of member 16 is secured to the lower end of a spindle 17 which is adapted to be detachably xed to a suitable actuating mechanism, such as an electric hand drill '(not shown) which allows the device to be handled with ease. The carrier lO'comprises an elongated member havingenlarged ends -10 and a reduced intermediate 'portion 10 A bore 18 is disposed centrally and longitudinally through said carrier 10, while a series of transverse bores 19 are arranged in each end 10 of the carrier in spaced relation with each other and with bore 18, each of said bores 19 intersecting said longitudinal-bore 18. When carrier 10 occupies vertical position, transverse bores 19- are dis-' posed horizontally at right angles to bore 18. Bores 19 are arranged in pairs, one bore of each pair being disposed in each end 10 with the axes of the bores of each pair dis- .posed in the same vertical plane.

An elongated pinion or revoluble member 20 is loosely disposed in' here 18 and its teeth operate through bores 19 where the lat ter intersect bore 18. A plurality of mounts 21 is carried by carrier 10 and 'are movable transversely relative thereto. A cylinder en-' the teeth of which mesh with the teeth of pinion or revoluble member 20.

In the instant case, carrier 10 is provided with four mounts 21 disposed at right angles o eac Other with he cylinder eng ging e e-v ments 22' arranged equidistant about the axis of revolublemember 20. e

I Thus, when member 20 is rotated one 1 direction, mounts 21" are moved into extended positions and, when member 20 is moved in opposite direction, said'mounts are retracted againstcarrier 10. In: this manner, the cyland the range of adjustment of said elements is'governed by the lengthof bars 25. The ends 10 of carrier 10, which are preferably rectangular in cross section, are each of suflicient thickness to provide thenecessary bearmg for bars 25 'so that the latter aresecurely mounted and have no play or loose movement in said bearin thereby maintaining cylinder engaging-e ements 22 at all times in pro er alignment-with each other and wit t e axis of the device.

- Channel members 24 side of-the' axis of each bar'25. lT-his' ofisetting of the channels 24 and elements '22'is desi ed -toplace said elements- 22 rearwardly o the axis of bars 25 'withrespect to the direction of rotation of the 'deViCe, in order are disposed to one inder engaging elements 22 can be adjusted radially with respect to the axis of the device,

to, provide uniform engagement between said elements and the cylinder surfaces and prevent wedging or binding action therebetween. In using this device, it is desirable to steady the same during the operation -there-.

of-so as to prevent chatterin and bindin inders. As shown in the drawings, the device is provided with four cylinder engaging elements 22. One pair of the diametrically I opposed elements is formed of abrasive ma'teand theconsequent uneven finish of .the cy g.

rial, such as carborundulni as indicated at 22", while the other ,pair isposed at right angles to the firstpair. is formed of nonabrasive resilient material, such as fabric impregnated with ru'bber,or a suitable composition of rubber and fabric, as indicated at '22". The material of these non-abrasive elements is of suflicient hardness and tough ness' to insure wearing thereof uniformly with the abrasive elements 22". At the same time, due to the nature of the material of which they are made, a suflicient frictional contact is produced to steady the device and prevent chattering or uneven operation thereof.

In using the device, it is highly desirable tofprovide an accurate adjustment of the elements and to lock said elements in adjust-' ed ositions against accidental movement during the operation of the device. Briefly described, this adjustment is obtained by means of. an adjusting mechanism 27 located adjacent to the upper end 10 of member 10 and manually operable for actuating, 'at a greatly reduced rate. of speed, revoluble member 20 which actuates arms 25. In the present instance, this adjusting mechanism 27 comprises a, train of gears operahle'by an adjusting member 29. It is not believed -that a detail description of the construction and operation of this adjusting mechanism 27 is necessaryin the present case as it is fully described and illustrated in the aforesaid application. serial No.-233,7 88.

The adjusting member 29 is held in posi tion by means of a member 30 which is se-. cured on an extension 31 of pinion 20. A spring, such as a spring washer 32, is interposed between member 30 and said adjusting'member 29. Thus a suitable de' cc of out of member 10 by the actuation of adjusting member 29, said'arms are'locked against inward movement under the radial pressure applied to the cylmder engaging elements,

' so that no accidental displacement of said elements can take place and the device will-remain in its adjusted position at all times.

The location of the adjusting mechanism is such that it" can be readily reached by the operator, and it is not necessary to- 'ther remove the device from the hand dril to which it isconnected, or to move the device away from the job for purposes-of adjustment as such adjustment can be readily made on the ]0l).

The abrasive elements 22" are secured in position in channels 24 in any suitable inanner. The non-abrasive elements 22 are preferably held in position by crimping or bending one edge of the channel so that said edge crimps the element.

The resilience of the non-abrasive guide elements introduces an available clearance be.

tween guides and cylinder wall to prevent binding or appreciable slowing up of the grinder during the operation thereof.- By the term clearance I mean either clear space or a yielding contact between thenon-abrasive guide elements and the cylinder wall in con-v tradistinction to the non-yielding contact of the abrasive elements with the cylinder wall,

essential to a rapid abrading action. I have found in practice that the cutting speed of the abrasive members is proportional, between certain limits, to the clearance (in the sense of theamountof movement permitted) between the guides and the cylinder wall. It

- is possible for there to be so much free, or

space, clearance that the abrasive action becomes negligible. By mounting the guide elements in a manner that they 'will yield to the pressure imposed on them by contact with the cylinder wall, it should be apparent that their contacting surfaces will wear down more rapidly the greater th s pressure be-' comes, and as the wear down'the pressure is relieved so t at 1t ultlmately becomes balanced with the wear both on the guides and i abrasive elements, It is in effecting this balance that the spring mounting of the vantageous results.

Obviously, the abrasive elements must fit snugly-into the cylinder if they are to be cf,- fective in reducing the wall surface, and they should resist the pressure caused by their frictional contact with the wall. the guides should not fit as closely as the abrasive elements and instead of resisting, they should yield to'pressure caused by frictional contact. The function of the guides is not to control the action of the al-irasive elements, but to steady them and maintain them parallel with the axis of the cylinder so as to re-shape the cylinder into true cylindrical form. This function is realized without impairing the speed with which the grimling is accomplished because of the variable clearance on the guides. The greater the pressure imposed on any guide at a given moment, the more this guide will yield until the pressure is released. Thus the speed and abrading action of the grinder is not retarded.

In the modified form shownin P igurcs T and 8, a non-abrasive element 34isyieldably .Preferably the ends of the spring are anchored to channel member 35 as shown.

To prevent undue out-ward movement of element 3a the latter .has extensions 34*. en-

guides, shown in Figs. 7 and 8 andhereinaftcr described, is particularly iulvantageous as there is not suflicient resilience in the material of the guides toproducethe most'ad-l However,

gageable by projections or flanges 36 of channel 35.

In the operation of my device, spindle 17 is i moved in a vertical plane so as to bring the cylinder engaging elements in contact withthe entire surface of the cylinder, thereby insuring-even finish of the cylinder. The use of elements 22 of non-ahrasive'material arranged between abrasiveelements 22 steadies the device and eliminates chattering. This greatly increases accuracy andsmooth opera: 3

tion of the device.

My improved honing device is of compact and durable construction, and is highly efficient in operation.

While I have shown and described the preferred form of my invention, it is obvious that the invention may be embodied in other specific forms without departing from the spirit thereof.

I claim:

1. An apparatus'of the class described com- I prising a revoluble carrier, mounts carried thereby and movable transversely thereof, cylinder engaging elements of abrasive matecarrier, 0 a plurality of-cylinder engaging spaced equidistant thereabout, and means for actuating all of said mounts and adjusting all of said elements radially of said axes.

2. -An apparatus of the class described comprisin in combination with a revoluble elements carried thereby in. spaced relation with each other and longitudinally of the axis of rotation, certainof said elements being formed of abrasive substance, and certain other of saidelements being formed of a composition of rubber of suitable hardness and of suitable reinforcing pliable material.

3. An apparatus of the class described comprisin a revoluble carrier, and a plurality of cylinder engaging elements carried there- .by and disposed longitudinall of the axis of rotation, certain of said e ements being formed of abrasive material, and certain other of said elements being formed of a composition of-rubber' and fabric to provide nonabrasive elements spaced with respect to said abrasive elements for steadying the operation of theapparatus and prevent chattering thereof.

a revoluble carrier and a plurality of mounts carried thereby, of a series of cylinder engaging elements of abrasive material carried by certain of said mounts,and a series of c 'linder engaging elements of reinforced ru ber 'arrangedin certain other of said.- mounts, said last mentioned elements having a com aratively large surface contact with the cylinder 40 surface.

. 5. In a honing device, the combination with a revoluble carrier, a series of cylinder engaging elements of abrasive material, and a series of cylinder engaging elements of nonabrasive material, said'last-mentioned elements being formed of a composition of fabric and rubber, the fabric being disposed radial-- ly with respect to the cylinder surface. 7 6. In a honing; device, a .mount therefor I provided with an outwardly presented longitudinal seat and rear'wardly and transversely extending rack portions, a non-abrasive cylin der engaging element secured in said seat and comprising an elongated strip of rubber of comprising a strip of rubber of suitable hard-' ness andreinforced with suitable pliable material 5 8. In a hcning device,'-a mount therefor' 4. In a honing device, the combination with gaging element secured in said channel and comprising in combination a longitudinally disposed outwardly presented channel member, a pair of spaced rack portions fixed to said channel member and extending rearwardly'and transversely therefrom and a cylinder engaging element secured in said channel, said elenient com rising an elongated strip composed of ru ber, and a plurality of layers of fabric embedded in said rubber and disposed radially with respect to the cylinder surface.

9. In a honing device, the combination of a revoluble carrier, a series of mounts adjustably carried thereby, a plurality of cylinder enga ing elements of abrasive material carried y certain of said mounts, a plurality of non-abrasive cylinder engaging elements carried bycertain other of said mounts, said non-abrasive elements consisting of strips of rubber, and a plurality of layers of fabric embedded therein, and means for adjusting said mounts. Y 10. In a honing device, the combination carried thereby, a series of abrasive elements fixedly arranged in 'certam of said mounts,

and a series, of non-abrasive elements of rubs a revoluble carrier, a plurality of mounts carried thereby, a series of abrasive'cylinder engaging elements carried by certain of said mounts, and a series of cylinder engaging elements of reinforced rubber carried by certain other of said mounts.

12. In a honing device, a mount therefor with a revoluble carrier, of a series of mounts comprising a vertically disposed outwardl V presented channel member and a pair of rac portions secured to and extendin transversely and rearwardly therefrom, an anon-abrasive element of. rubber having embedded disposed in said channel member with said flexible reinforcing material arranged radially with respect to'the axis of rotation.

13. In a cylinder honing device, a revoluble carrier, a plurality of cylinder abrading circumferentially spaced relation, rigidly respect to the cylinder wall.

therein a pluralityofflexible woven material mounted abrasive elements and yieldingly mounted non-abrasive elements carried re spectively b alternate mounts.

15. In a oning device, amount comprisand a strip of resilient material secured therein and extending therefrom for engagement with the cylinder surface. I i

16. In ahoning device, a mount having ing an outwardly presented channel member,

a longitudinally disposed seat, and a nonabrasive cylinder engaging element secured therein and consisting ofa strip of resilient material. v

6 17. In a cylinder honing device, a revolu-.

ble carrier, ri 'dly mounted abrasive elev ments supporte by the carrier and arranged to rotate over the cylinder surface, and resilientl mounted non-abrasive elements sup- I 10 ported y the carrier and arranged for rotation over the cylinder surface, said non-abrasive elements com risin guides for controlling the action of the a rasive elements.

. 18. In a cylinder honing device, a ,revoluble carrier, a plurality 0 cylinder contacting elements supported by the carrier and arranged in circumferentlally spaced relation, alternate elements comprising abrasive stones mounted for non- 'eldmg contact with 0 the cylinder wall, an alternate elements 7 com rising non-abrasive guides mounted for Y yiel ing contact with the cylinder wall.

19. In a cylinder honin device, a revoluble carrier-,a plurality 0? cylinder contact- 25 ing elements supported by the carrier and arranged in circumferentlally spaced rela-- tion, some of said elements com rising a'bra--. s'ive stones mounted for non-yi ding contact with the cylinder wall, and some of said elef ments comprising non-abrasive guides mounted I1:01 yielding contact with the cylinder" In testimony whereof I hereunto aflix my si ture. 35 -JO.SEPH SUNNEN. 

